Boiler Operation Engineer Exam Previous Year solved MCQ Set - 24
1. In pure oxygen, the maximum flame temperature is _____________
a) higher than the theoretical flame temperature
b) lower than the theoretical flame temperature
c) equal to the theoretical flame temperature
d) none of the mentioned
Ans. a
2. The heat transferred when the H2O in the products is in the liquid state is called?
a) HCV
b) LCV
c) LHV
d) None of the mentioned
Ans. a
3. The maximum temperature achieved for given reactants is called?
a) Practical Flame Temperature
b) Critical Temperature
c) Theoretical Flame Temperature
d) None of the mentioned
Ans. c
4. The heat transferred when the H2O in the products is in the vapour state is called?
a) HCV
b) LCV
c) HHV
d) None of the mentioned
Ans. b
5. Maximum Theoretical Flame Temperature corresponds to _____________
a) Partial Combustion
b) Incomplete Combustion
c) Complete combustion
d) None of the mentioned
Ans. c
6. The maximum turbine flame temperature can be can be controlled by?
a) amount of oxygen extracted
b) amount of air supplied
c) amount of air extracted
d) none of the mentioned
Ans. b
7. Flue gas discharge velocity through chimney of a big thermal power plant may be around __________ m/sec.
a) 0.5
b) 500
c) 10
d) 50
Ans. c
8. If the enthalpy change for a reaction is zero, ΔG° is equal to _____________
a) TΔS°
b) -TΔS°
c) -ΔH°
d) lnKeq
Ans. b
9. The free energy of chemical elements at 1 atm & 25HoC is assumed to be?
a) Negative
b) Positive
c) Zero
d) None of the mentioned
Ans. c
10. Which of these properties specifies the minimum temperature at which fuel oil can be ignited?
a) pour point
b) flash point
c) heating value
d) viscosity
Ans. b
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